Ni ELECTROFORMED COIL-SHAPED ULTRAFINE SPRING, Ni ELECTROFORMED PIPE PARTIALLY FURNISHED WITH COIL-SHAPED SPRING STRUCTURE, AND PROCESS FOR PRODUCING THEM

摘要

[PROBLEMS] To provide an ultrafine coil-shaped spring that despite the ultrafineness of the coil-shaped spring, has a given elasticity, for example, an elasticity required for a coil-shaped spring for contact probe and provide an Ni electroformed pipe partially furnished with the coil-shaped spring structure. [MEANS FOR SOLVING PROBLEMS] There is provided an Ni electroformed coil-shaped ultrafine spring having an outside diameter of 32 to 500 µm and an inside diameter of 30 to 450 µm, and provided an Ni electroformed pipe partially furnished with the coil-shaped spring structure. The Ni electroformed coil-shaped ultrafine spring and the Ni electroformed pipe partially furnished with the coil-shaped spring structure both consist of an electroforming material of 93 to 191 GPa Young's modulus and 300 to 600 Vickers hardness.